2006/02/03 by F. Ronning, C. Capan, E. D. Bauer +3 · 4 citations
Materials Science · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Critical point (mathematics) #Field (mathematics) #Geometry #Iron-based superconductors research #Magnetic field #Phase transition #Physics #Physics of Superconductivity and Magnetism #Quantum critical point #Quantum mechanics #Quantum phase transition #Rare-earth and actinide compounds #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.73.064519
4 pages, 3 figs, PRB in press
arxiv created 2006/02/03 · openalex publication_date 2006/02/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report resistivity measurements in the normal state of CeCoIn5 down to 40\phantom\rule0.3em0exmK and simultaneously in magnetic fields up to 9\phantom\rule0.3em0exT in the [001] crystallographic direction and under pressures up to 1.3\phantom\rule0.3em0exGPa. At ambient pressure the data are consistent with a field tuned quantum critical point coincident with the superconducting upper critical field Hc2, as observed previously. We find that with increasing pressure the quantum critical point moves inside the superconducting dome to lower fields. Thus, we can rule out that superconductivity is directly responsible for the non-Fermi-liquid behavior in CeCoIn5. Instead, the data point toward an antiferromagnetic quantum critical point scenario.